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Mon, 27 Jul 2026 11:12:11 -0700 (PDT) Received: from hu-mdsor-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-13d2d1d0d1esm33096048c88.0.2026.07.27.11.12.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Jul 2026 11:12:11 -0700 (PDT) Date: Mon, 27 Jul 2026 23:42:04 +0530 From: Mohit Dsor To: Dmitry Baryshkov Cc: Konrad Dybcio , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, venkata.valluru@oss.qualcomm.com, Jessica Zhang , Mohit Dsor Subject: Re: [PATCH v2 1/2] arm64: dts: qcom: shikra-iqs-evk: Add LT9611UXD HDMI bridge support Message-ID: References: <20260717-shikra-work-v2-0-86ae8552259e@oss.qualcomm.com> <20260717-shikra-work-v2-1-86ae8552259e@oss.qualcomm.com> <04a9d8ce-e83a-4307-8b14-4afe739b31e0@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Proofpoint-Spam-Info: AW1haW4tMjYwNzI3MDE2OCBTYWx0ZWRfXzYwLrwbVv1Vq WX5WW+IWLV2khDMoV7/Gf4VedOcCIKHnIBiEdI/Gr6UD5+cpkAUXtWd/0IW5pVyFkDRsOW23lmH WeHNEN2DggUYnrZYUdDjWm8gB86lxLc= X-Authority-Analysis: v=2.4 cv=XuDK/1F9 c=1 sm=1 tr=0 ts=6a679f7d cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=kj9zAlcOel0A:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=EUspDBNiAAAA:8 a=5IGsX73iB-lTh6suV3gA:9 a=CjuIK1q_8ugA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzI3MDE2OCBTYWx0ZWRfX8nQgGIFBPOCO YOhMaarzPzBPktfJd4u1SLpfam5auXeJhaszSX9ZL9ZONbmIlrQARX8SryqVE16ba/mOPRNLy0T zQ7wDVHn8dMsUFlhV6c+yKos9eS/JVHrwB8vk1lBYkiKNrr8Rofjcz8D4Iaj7pryv3L+Reis9wM XyP8zzhHxoFgdVTUP+t9Y8qgUgWKhKHNoKM7ho1CGQWdzQv1D/5/OK716CP37Vcu21mtngFuSLa 1aEKLmoZWQJnT5IVx+liKJKq2VNzWsqbc/utx2vzauuVnnTE6C80E48El9soiAtNYKQ5PzUa442 5eHFAsNYCD5sLZvQxiD1DXD6RbYt0iwlJPCFIuPJK8taB5+ROk0eDo5ZKyyo9acXCVgVHHHFEo+ yjpAgNRg2m+pT+BIo9G6gyM9uSm5I+KEh/i9FX6yM+YFAystq9hgIhLV2pq6QPKGvESyznxBkue iXik3c2HS4uJddxjh0A== X-Proofpoint-ORIG-GUID: 1KviF8DW4a8Oy4lFHEzoMkpb-PkqEoNv X-Proofpoint-GUID: 1KviF8DW4a8Oy4lFHEzoMkpb-PkqEoNv X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-27_05,2026-07-27_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 adultscore=0 impostorscore=0 phishscore=0 clxscore=1015 suspectscore=0 bulkscore=0 lowpriorityscore=0 spamscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607270168 On Wed, Jul 22, 2026 at 04:49:45PM +0300, Dmitry Baryshkov wrote: > On Sat, Jul 18, 2026 at 04:54:07PM +0530, Mohit Dsor wrote: > > On Fri, Jul 17, 2026 at 11:17:10AM +0200, Konrad Dybcio wrote: > > > On 7/16/26 9:30 PM, mohit.dsor@oss.qualcomm.com wrote: > > > > From: Mohit Dsor > > > > > > > > Enable the Shikra MDSS display subsystem on the Qualcomm Shikra IQS > > > > EVK board and add the Lontium LT9611UXD DSI-to-HDMI bridge node. > > > > > > > > The LT9611UXD is connected via I2C (bus 4, address 0x41), powered by > > > > a GPIO-controlled 3.3V regulator (PM8150 GPIO4) and an always-on 1.8V > > > > rail. Reset is on GPIO76 and interrupt on GPIO85. > > > > > > > > The bridge receives DSI output from MDSS and drives an HDMI-A > > > > connector, with the link wired as: DPU -> DSI0 -> LT9611UXD -> HDMI. > > > > > > > > Signed-off-by: Mohit Dsor > > > > --- > > > > > > Does the other EVK not have this same hardware? > > Yes other variants have this hardware but only IQS variant has > > DS-HDMI as default, others have DLC panel as default. > > By 'default' do you mean some DIP switches? If so, please consider > providing overlays for the bridge to be used on other variants of the > EVK. There are separate daughter cards for DLC Panel and DSI-HDMI, at a time only one of them can be connected. We are planning to submit a separate patch series covering all overlays together, if that is Ok DLC panel overlay for the IQ variant DSI-to-HDMI overlays for the CQ and CM variants > > > > > > > [...] > > > > > > > +&pm8150_l11 { > > > > + /* DSI VDDA - must be at NOM voltage for PHY PLL lock */ > > > > > > This comment is superfluous > > This comment will be removed in next revision. > > > > > > Konrad > > -- > With best wishes > Dmitry